Illuminating appliance.



VAN RBNSSELABR LANSINGH.

ILLUMINATING APPLIANCE APPLIOATION FILED APR. 19, 1010.

1,090,070. Patented Mar. 10, 1914 lV/TNESSES against the ceiling.

UNITElEt @TATEd PATENT l l ltll l,

VAN RENSSELAER LANSINGH, OF NEW YORK, N. Y.

ILLUMINATING APPLIANCE.

Specification of Letters Patent.

Patented Mar. 10, 1:11 at.

Application filed April 19, 1910. Serial No. 556.418.

ing Appliances, of which the following is a specification.

My invention relates to illuminatmgappliances intended especially to throw hght upward against the ceilin Certain features of the 'nvention may, however, be available when the apparatus is differently placed in SGIVltC.

In interior illumination it has been proposed to illumii ate an apartment by means of opaque reth'rtors directed toward the ceiling and a light source, such as an 1neaiulesccnt lamp, placed within the reflector which conceals it from direct view. The light striking the ceiling is thoroughly dill fused and gives a very soft agreeable illumination.

In carrying out my invention I propose to use, instead of an opaque rellector, a transparent or translucent reflector consisting, for example, of a prism glass reflector of any approved form. This reflector is to have an artificial light source within it at its locus and is to be directed upward, and will throw the greater portion of the light emanating from the light source upward A certain percentage of the light rays, however, pass through the body of the reflector and downward into the room. I

A lighting group such as has been described can be used without any additional essential elements, but in further carrying out. my invention I generally prefer to place the inverted prism glass rcllector within a howl ot translucent, frosted or decorated glass. The light; passing downward through the rellector, also passes through the outer int-losing bowl and by it is further dill'nsed or modified or colored to produce deco 'ative ell'ects.

My invention provides the diffused illumination, which is sought in appliances of this character, caused by the rays thrown utnvard against the ceiling by the reflector, and also supplies a certain percentage of direct illumination from the rays of light which pass downwardly through the reflector and this direct illumination may, as

has been pointed out, be further modified by the outer inclosing bowl.

It is to lie understoodthat the invention 18 rapahle of variations and may be embodied in dill'erenl. terms.

I illustrate in the accompany "1g drawing one of the embodiments of the invention, which I have chosen for illustrative purposes.

The drawing is a vertical diagrammatic section through an appliance embodying the 1nvent1on.

L designates the light source, which may conveniently be an incandescentlamp suspended from the ceiling by a rod or other suitable support S.

R is an inverted prism glass reflector of any approved form so arranged that the light source is in the proper position within it.

B is a bowl, usually of glass, which may be-entirely or partially fire-flashed, etched, frosted, or colored, orotherwise treated to give decorative effects or modify light rays passing through it. The bowl B is placed outside the reflector and is supported by chains C or in any other convenient way and the reflector in turn may be supported by a bracket X resting on bowl B or in any other preferred manner.

According to the well-known law of prism glass rellcctors, a large proportion of the light emanating from the lamp L is thrown upward against the ceiling and dill'uscd. A remaining percentage of light passes out and downward through the retlector, supplying a certain amount of direct ilhnninationto the room. These direct light rays are further modified by passing through the outer bowl B.

Among the many possible modifications of the strlwture employed to carry out the invention, it may be ,ointed out that instead of a prism glass rellector, any 1'c llector may be employed which directs upwardly a large portion of the light rays and permits a portion of the rays through the body of the reflector and directly downward into the room or through the int-losing bowl B. For instance a rcllcclor or shade oli opalized glass, or one coated on the Hillside with transhu'cnl light colored enamel. or a bowl exterior-tr l'rosted with a polished in-- ncr surface, may be substituted l'or llurpri matic reflector ll. 'lhe inclosiug howl ii ill) ' need not be a simple translucent or decorated glass bowl, but may be a. composite structure composed of different panels of translucent, frosted, etched or decorated 5 glass, orother suitable transparent or trans- 10 reflector surrounding the source, an upwardly facing diffusing bowl surrounding the reflector, and means for supporting said reflector and said bowl by their outer edges from above,

topics of this potent may be obtained. for five cents each, by addressing the Commissioner of Enteritis,

2. An indirect-lighting appliance comprising a light source and a member for supporting the same from above, an upwardly-facing translucent reflector surrounding said source, an upwardly-facing diffusing bowl surrounding said reflector and supporting means inde endent of the aforesaid supporting mem er extendin from above to the outer edges of said bow and said reflector.

VAN RENSSELAER LANSINGH.

Witnesses:

JOEL B. LIBERMAN,

4 PHILIPS. MGLEAN.

Washington, D. G. 

